Balance board



FIG. 1 shows a first perspective view of the balance board;

FIG. 2 shows a front view of the balance board;

FIG. 3 shows a rear view of the balance board;

FIG. 4 shows a first side view of the balance board;

FIG. 5 shows a second side view of the balance board;

FIG. 6 shows a top view of the balance board; and,

FIG. 7 shows a bottom view of the balance board.

The portions shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a balance board, as shown and described. 